Hmmm… Quite happy to sit corrected here. If they are using TBMs then other than where the west of the tunnel is going to be I don’t see a problem.

Was definitely going to be c&c originally but that may have been many years ago (the whole tunnel the A303 past Stonehenge thing has been going for 30 years or more).

I haven’t kept up with the project since moving away a few years ago.